hopkins



(No Model.)

3 Sheets-Sheet 1. A. J. HOPKINS.

' PUMP.

Patented July 29, 1890..

win-alum lilllll WITNESSE Y INVENTOR Attorney (No Model.) 3 Sheets-Sheet 3. A. J. HOPKINS.

PUMP.

N0. 433,406. Patented July 29, 1890.

WITNESSES JV'V'EJV'TOR 7 0',

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UNITED STATES ANDRElV J. HOPKINS, OF

PATENT OFFICE,

ROCHESTER, NEW YORK.

PUMP.

SPECIFICATION forming part of Letters Patent No. 433,406, dated July 29, 1890..

Application filed January 8, 1886.

To all whom it mag concern:

Be it known that 1, ANDREW J. HOPKINS, a citizen of the United States, and a resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Pumps; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which Figure 1 is a side view of my improved pump. Fig. 2 is avertical sectional view of the same. Fig. 3 is a horizontal sectional view on line as 00, Fig. 1. Fig. a is a similar View on line y 1 Fig. 2; and Fig. 5 is a perspective view of the pump as it is placed in a well ready for operation.

Similar letters of reference indicate corresponding parts in all the figures.

My invention has relation to double-acting pumps; and it consists in the improved construction and combination of parts of thesame, as hereinafter more fully described and claimed.

In the accompanying drawings, the letter A indicates the pump-cylinder, which is provided at diametrically opposite sides with side tubes B and O integral with the pumpcylinder.

The piston D is provided with packingdisks E, having their flanges turned in opposite directions, and is secured to the piston-rod F, which passes through a central stuffing-box G in the head II of the pump. This head is formed to correspond to the shape of the upper end of the cylinder, which is provided with a flange I, and the head is formed with a knee or curved channel J, one end of which Opens through the head into the pump-cylinder, while the other end of the knee, which is integral with the head, opens into the upper end of the inlet side tube B. A Valve K is secured with its inner end to the center of the inner side of the head, having a perforation L for the passage of the piston-rod, and the free end or flap of this valve plays upon the opening of the knee in the head of the cylinder.

The bottom M of the pump-cylinder isformed Serial No. 187,986. (No model.)

with a socket N, into which the suction-pipe O is secured, and with a channel P, which opens into the socket for the suction-pipe and into the lower end of the inlet side tube, the aperture of the said curved channel registering'with the lower end of the side tube. The bottom is secured to the flange Qat the lower end of the cylinder, corresponding in shape to the same, and the central aperture R in the bottom, which enters the socket for the suction-pipe, is covered by an inwardly-opening valve S, secured at one side to the side of the aperture, and having preferably a weight T secured to it to insure its more perfoot action in closing upon the aperture.

The delivery side tube 0 has an opening U at its lower end, by, means of which it communlcates with the lower end of the pumpcylinder, and the upper end of the tube is enlarged to form a chamber V, having an aperture WV communicating with the upper end of the pump-cylinder, and a top aperture X, which registers with an aperture in the head of the cylinder, which aperture is extended upward in a socket Y, into which the delivery-pipe Z is secured.

The aperture WV of the chamber communicating with the upper end of the cylinder and the apertureA' at the upperend of the tube and at the bottom of the chamber form valve-seats,

upon which the leaves or wings of a valve B Y play. This valve consists of the metalframc D and a leather packing O, riveted or otherwise secured to it, and is formed with a round back I), and with wings or leaves diverging from said round back to form a V shape with their outer edges spread apart, the angle between said leaves being less than the angle between the base and side walls of chamber V, whereby the valve may rock between said walls, and whereby each of the said wings will form an inclined bearing-surface for the passing water, as will be understood from the drawings. It will be seen that in operation the valve is placed loosely in chamber V, with its round back arrranged to rock or fulcrum at the juncture of the side and base walls of such chamber, the valve being alike at both sides, so it can be reversed side for side, if desired, and so that no matter whether one or the other wing be placed next the opening the valve will operate properly,

thus avoiding the necessity of any care in setting the valve. Itwill also be noticed that when one wing of the valve is seated its other wing projects across the line of the opening it controls, and being in the path of the wathe valve will be held in the chamber so it may freely rock and yet so it cannot get displaced. It will now be seen that as the piston is reciprocated the water will alternately enter through the central aperture in the bottom of the cylinder, raising the valve upon' the same or through the curved channel and through the inlet side tube and through the curved channel in the head of the cylinder, forcing the valve at the head down, and the water will alternately be forced directly into the chamber having the V-shaped valve through the aperture communicating between the upper end of the cylinder and the chamber or through the delivery side tube and up through the aperture in the bottom of the chamber, the force'of the water entering by one aperture forcing the valve to fit upon the opposite seat with its other wing, so that the alternating current cf water passing through the apertures in the chamber insures a prompt action of the valve and prevents any waste of water or of motive power in. consequence thereof by immediately closing the opposite aperture when the stroke is changed.

It will be noticed that the outer or bearing surfaces of the wings of the rocking valve R are smooth, so that water impinging the same will flow off without being stopped or retarded in any degree thereby; also, that the wings of the valve bear such relation to their seats W A that the open wing of the valve in the diiferent positions thereof is inclined with reference to the channel or port it closes, so

that the stream of water through such channel or port impinging the inclined and smooth bearing-face of the valve operates thereon with a wedging action which serves to hold the closed wing of the valve firmly to its seat.

At the same time the bearing-faces of the valve being smooth, so that no obstruction is otfered to the free movement of the water thereon, I- avoid any vibrating or chattering of the valve from the action of the water, such aswould likely occur should obstructions or projections be provided on the face of the valve.

Having thus described my invention, I claim and desire to secure by Letters Patent of theUnited States-- The herein described improvement in pumps, consisting in the combination,with the cylinder A and the piston operating therein, of the side tube G, extending alongside the cylinder and opening thereinto at its lower end, the chamber V, arranged at the upper end of the tube 0 and having its bottom arranged approximately horizontal, and provided with port-opening A, communicating with the tube'O, and having the partition or side wall between it and the cylinder provided with opening W, and the rocking valve arranged to rock at the juncture of the side and base walls of chamber V, and between the ports A WV, the said valve being formed with a round back and with wings or leaves diverging from said roundback toward their outer edges, and spread apart at such outer edges, the angle between the leaves of the valve being less than that between the base and side walls of chamber V, whereby the valve may rock between the said walls, and whereby each of the said wings when open will form an inclined bearing-surface for the passing water, substantially as described, and

for the purposes specified.

In testimony that I claim the foregoing as 

